A micro-stressed support structure for large-aperture mirrors

Abstract

The invention belongs to the field of optics and provides a micro-stress support structure for a large-diameter reflector, aiming at solving the problem that the traditional support structure is difficult to ensure the surface shape of the reflector. The invention includes a large-diameter reflector, a mirror base, an axial fastening pressure ring and an optical system base plate, wherein the mirror base includes a mirror base base plate and a mirror base central axis, and the mirror base base plate includes a front end base plate and a rear end base plate; the axial fastening The follower ring consists of an inner and outer ring with multiple tabs. Stress relief grooves are arranged between the front end base plate and the rear end base plate, on the central axis of the mirror holder, and between the inner ring and the outer ring. When assembling, the central axis of the mirror base passes through the center hole of the large-diameter reflector to form a clearance fit, the bottom of the large-diameter reflector is close to the bottom plate of the front end of the mirror base, and the other end of the large-diameter reflector is fastened by an axial fastening pressure ring Positioning, the bottom plate at the rear end of the mirror base is connected with the bottom plate of the optical system through a flexible hinge. The invention can effectively guarantee the surface shape precision of the reflecting mirror, and has the advantages of simple structure and easy assembly.

Description

technical field [0001] The invention belongs to the field of optical engineering, and relates to a micro-stress support structure of a large-diameter reflector, where the large-diameter reflector refers to a reflector with a diameter of ≤600mm. Background technique [0002] At present, in the field of optical engineering, especially in the development of large-aperture optical systems, the supporting structure of large-aperture mirrors has become the focus of research. Thermal changes and vibrations caused by the surrounding environment of the optical system, as well as the assembly stress brought by the traditional support structure, have a direct impact on the surface shape of the mirror, and the surface shape of the mirror is directly related to the optics. The performance index of the system, so if there is a problem with the support structure of the mirror, it will cause the performance index of the optical system to fail, or even make the optical system scrapped. [0...

AI Technical Summary

Problems solved by technology

Thermal changes and vibrations caused by the surrounding environment of the optical system, as well as the assembly stress brought by the traditional support structure, have a direct impact on the surface shape of the mirror, and the surface shape of the mirror is directly related to the optics. The performance index of the system, so if there is a problem with the support structure of the mirror, it will cause the performance index of the optical system to fail, or even make the optical system scrapped

[0003] For reflectors with a diameter of less than 600mm, rigid support is traditionally used, and the axial end of the reflector is axially fixed by a pressure ring. It is difficult to eliminate or reduce the thermal deformation of the optical components of the system and the vibration of the optical system. The pressure ring is easy to cause over-positioning of the reflector, which in turn affects the surface accuracy of the reflector

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